Sunday, September 21, 2008
Nice end to summer.. unsettled start to fall
It was a beautiful end to summer over southern MB with sunny skies, balmy southeast breezes and temperatures in the 25C range. Fall officially arrives Monday morning at 10:44 am, and will be greeted with some unsettled weather in the form of showers and possible thunderstorms. The unsettled weather will come in two waves. The first wave of precipitation is expected overnight as a band of showers and scattered thunderstorms over North Dakota moves northward into the Red River valley. These showers may bring 5 to 15 mm of rain to Winnipeg overnight, although heavier amounts of 25-35 mm are possible in thunderstorm activity over portions of southern MB by early Monday morning. There should be a break in the shower activity through midday Monday which will allow temperatures to warm into the 20s along with dewpoints in the midteens. This will set the stage for another round of showers and thunderstorms to develop by late afternoon over southern MB ahead of a cold front. This line of activity may be accompanied by severe thunderstorms late Monday into Monday evening with heavy downpours (giving local rainfall amounts of 30-50 mm), strong winds, and possibly large hail. There may even be the threat of isolated tornadoes with some supercell storms early in the evening. Stay tuned as Mother Nature may be ushering in fall on a stormy note.
Posted by rob at 8:14 PM